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離散數學裏的邏輯運算子 ∨是析取符號 ∧是合取符號 假如有兩個命題P和Q,當且僅當P,Q同時為F是,P∨Q的真值為F,否則為T;當且僅當P,Q同時為T是,P∧Q為T,在其他情况下,P∧Q的真值為F. 然後,析取∨可以理解為“可兼或”,合取∧可以理解為“且”.
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